N-400 Naturalization Date Calculator: The Earliest Day You Can File
Most green card holders must wait 5 years to apply for citizenship; those married to and living with a U.S. citizen wait 3 years. Both can file 90 days before the period ends — the 90-day early filing rule is often overlooked.
N-400 filing date calculator
Calculate the earliest date you can file for U.S. citizenship
The "Resident Since" date on your green card (I-551)
Four Requirements
① Continuous residence for 5 years (or 3)
Counted from the day you became a permanent resident. The 3-year rule requires your spouse to have been a U.S. citizen for the entire 3 years — under 8 USC 1430(a). If your spouse became a citizen recently, the three years start over from the day your spouse naturalized, not from your wedding day. This is common and easy to get wrong.
② File 90 days early
You can file the N-400 90 days before you meet the residence requirement. The starting point is the "Resident Since" date on your green card.
③ Physical presence
Under the 5-year rule you must have been physically in the U.S. for at least 30 months (out of 60); under the 3-year rule, at least 18 months (out of 36).
④ 3 months in your state or USCIS district
Before filing, you must have lived for 3 months in the state or USCIS district where you apply.
Frequently Asked Questions
- Do long trips abroad matter?
- A single trip of more than 6 months but less than 1 year is presumed to break continuous residence, which you can rebut with evidence; a trip of more than 1 year usually breaks it outright. After a break you don't just keep waiting out the original 5 years — under 8 CFR 316.5(c)(1), you can file only 4 years and 1 day after the date you returned (2 years and 1 day under the 3-year rule).
- Could I miscalculate the 90 days?
- This is a common reason for denial. Count exactly from the Resident Since date on your green card — filing even one day early can get you denied.
Sources: Data and Law
Related Tools
This tool gives estimates based on public regulations and government data, for reference only. It is not legal advice. We are not a law firm. Every case is different — talk to an immigration lawyer before making a decision.